Source-based Assessment Model 
The environmental assessment model will be based on a 
source-agent-receptor flow which will estimate exposure and 
assess a range of impacts. 
¢ The source is the point of origin, such as manufacturing or 
mining, of an agent. 
¢ The agent is an element or action that presents a hazard or 
ecological stress. 
4 V2c ADV 
¢ The receptor is the human or ecological unit exposed to the 
agent. 
The characteristics of the sources, agents and receptors will be 
defined during Phase | of the project. The level of detail will 
depend on the availability of the data. 
